EMD (Electro-Motive Diesel) | 11,781 followers on LinkedIn. Progress Rail, a Caterpillar company, designs and manufactures EMD rolling stock products and services for global railroad customers. Our products include new, used and remanufactured locomotives, transit units and freight cars, with parts, component reconditioning, repair and leasing services. We are a premier employer within the rail industry, with products and services represented in over 100 countries around the world.